Solar PV Panels information

Solar power is an excellent way to save on electrical utility bills, reduce our carbon footprint by reducing pollution and also have electrical power to your availability during load-shedding in South Africa. But this is not where solar PV panels and solar energy’s benefits stop. The truth is, solar energy alongside solar panels, solar inverters, and solar hot water heaters (solar geysers), allow many communities to be empowered and not just by electricity alone. Solar panels, solar energy, and all solar products provide excellent jobs for many people allowing them to beat poverty. Renewable energy provides the job boost South Africa needs. The more the renewable energy sector in South Africa matures, the more jobs and empowering communities will take place.

How do solar PV panels work?

Solar PV panels work with photons, which are particles of light traveling from the sun to the earth and which make up light. The photons received from the sun, make direct contact with the solar PV panel collector which then breaks electrons free from atoms, therefore, generating a flow of current or electricity. Basically, the solar panel’s photovoltaic cells convert solar energy from the sun into usable electricity. The electricity generated by solar panels is collected as DC (direct current) energy. The direct current is then transferred to a solar inverter and is converted to AC (alternate current) energy which could power your electrical devices.

A more technical way to summarise photovoltaically is to say, solar PV panels are able to produce voltage through photoemission when solar panels are exposed to radiant energy which can be found in light from the sun.

Alternate current (AC) is the current which you use in your wall’s electrical sockets to provide electricity to electrical appliances in your home. If you have solar PV panels installed on your roof, the system’s electrical panel will transfer electricity to your electrical devices.

How Do Solar Panels Work
How Long Do Solar Panels Last

How long does a solar panel last?

Solar panels are durable and efficient solar components which can last a very long time. Many residential solar panel products are guaranteed for years or even decades. Some manufacturer warranties allow up to 30-year warranties on solar panel products. Solar panels and their components, do not wear down easily, and has the possibility to produce clean energy even beyond their estimated lifespan predictions.

Many products on the market today start to break apart or stop working if they reach their warranty period. This is not the case with quality solar panel systems. However, solar panels may become less efficient at producing clean energy the older they get. This is also known as photovoltaic degradation. But, even if they start losing their efficiency to produce clean energy, the amount that solar panels lose is about 0.5 efficiency per year after their lifespan has been reached.

Solar panel maintenance

Maintenance on solar panels are not really required if the solar panels were installed carefully and correctly. As stated before, solar panels can last a very long time due to their design and quality-built factor. If you keep your solar panels clean from snow, dust and debris, they should last for years to come.

On the other hand, the solar inverter which converts DC to AC from the solar panels, will likely be more prone to fail and be replaced. Solar inverters also receive manufacturer warranties but they are much shorter. Solar inverter warranties vary between 5 to 10 years on average. A solar inverter, unlike solar panels, will not degrade slowly over a period of time, instead, solar inverters may fail unexpectedly.  If a solar inverter stops working, it will need to be replaced. 

However, with the introduction to solar micro-inverters, which are installed alongside each solar panel, will last much longer. These solar micro-inverters are quickly replacing the central solar inverters in modern solar conversion installations. Solar micro-inverters can have lifespans of up to 25 years.

When a central solar inverter fails, your whole solar system may shut down, unlike solar micro-inverters, which if one fails, your solar system may still function and produce solar energy into your home.

Solar Panel Maintenance
How Many Solar Panels Do You Need

How many solar PV panels do you need?

Determining the number of solar PV panels, you require would depend on your solar requirements for your home.  An easy start to determine the number of solar panels you require is to determine the flowing factors:

How much solar power do you need?

Looking at your utility bills from over a period of time can assist you in a quick evaluation of the solar power you might require. Calculating the amount of solar powers, you will need, you can multiply your home’s hourly energy requirements by the peak sunlight hours and dividing the number by a solar panel’s wattage. If you use a lower wattage of about 150W and a high wattage of 350W, you can establish a range for example: 17 – 42 solar panels to generate 11000kWh per year. Also, to get an accurate estimation, you would need to take into consideration, your roof size, how much sunlight you receive and the type and capacity of the solar batteries which will be installed.

How much Solar Energy Do You Require

What is your current watt usage at your home?

The average household in South Africa consumes electricity up to 1kWh. An energy saver fridge can use up to 350kWh per year which estimates a cost of R1.40/kWh and is less than R250 per year. You can use your electrical utility bill to determine your average monthly, weekly, and daily watt usage at your home.

There is usually a Kwh (kilowatt used per hour) indication which also gives a time period attached to it. If the electrical utility bill does not include any kWh consumptions, you might look for start and ending meter readings. You can subtract the previous reading from the current one. It is best to work with daily or even better, hourly electrical usages for your solar panel calculations. You can also divide your monthly or annual average electricity usage by 30 or 365 days and then divide it again by 24 to determine your hourly average electricity usage. This number will be in kWh. A kilowatt-hour is how much electricity gets used at a given time multiplied by the total time the power is used. The average home uses about 900Kwh in 30 days. That is about 30kWh per day and 1.25kWh per hour.

If you determined your average energy usage per day, you can start to calculate your solar needs. By having this information, you can calculate the numbers of kilowatt per hour you will need to produce with solar panels to ensure that 100% of your energy needs will be covered by your solar panel system.


Keep in mind, solar panels don’t always operate at their full capacity. There are many factors that can limit solar panels to always work efficiently. Weather conditions are one of the most common factors. Solar experts suggest that you apply an extra 25% kWh to your target daily energy consumption. This is to ensure that you can generate the clean energy you need it.

Solar panel installation area

Solar PV panel installation area

If your home’s roof is constructed in an unusual manner or the roof is small in size, it will be important to keep solar panel sizes and numbers in consideration. Residents with large roofs can buy more PV panels which are also larger in sizes. This will lower the cost per solar PV panels. For smaller roofs, it is best to install smaller highly efficient PV panels to generate solar energy.

Solar PV panel sizes and dimensions

The most common solar panel sizes for residential homes are about 165cm by 99cm. This is just an average and the number and solar panel dimensions could vary from manufacturer and also the solar panel type. As solar technology advances, the solar panel dimensions usually stayed the same but, the efficiency of solar energy collection by solar panels, have increased drastically. Always use a professional solar panel installer who will assess your home and roof, determine the best angles for most sunlight and other aspects to arrange and install solar panels to your home. 

Solar Panel Sizes And Dimensions
Solar Panel Efficiency On Clouded Days

Solar panels on cloudy days

When it is cold, raining or cloudy outside, will solar panels e able to work? Yes, indeed they will. Solar panels will function just fine on cloudy, cold or rainy days. However, solar panels produce solar energy more efficiently when they are exposed to direct sunlight.  Many countries in Europe have cloudy days, yet still, they use solar panels effectively.

But what about winter? Will solar panels work when it’s very cold? Absolutely! Solar technology in solar panels works by photons or light collected by the solar panel to generate electricity and not from direct heat. Even if it’s winter, summer, cold or hot, solar panels will work efficiently in all times during the year.

Solar panel prices

We at JC Solar Panels offer the best quality solar products and the best Solar Panel Prices South Africa has to offer. In the last couple of years with solar product demand increasing in South Africa, most of the solar products and solar prices from solar suppliers or solar installers decreased but with all this, obtaining the correct solar system became a difficult task. With so many solar geysers, solar inverters, solar batteries, and solar panel suppliers, the competition increased which allowed an effective decrease in solar products and especially, solar panel prices. Solar price reductions will continue around the world as new technology is being developed for more affordable solar products. This will also reduce solar panel prices in South Africa for the years to come. 

Solar Panel Prices

Solar panel product quotes

If you have determined your requirements for a solar product system, you can get quotes on solar products. Also, make sure you get the right high-quality products as many people sell cheap solar products which are not as reliable. Also, ensure to read all the fine details from solar products offered, as many solar suppliers or solar installers does not include everything with their products listed. You can send JC Solar Panels your solar requirements and we will ensure to give you the best prices for the highest possible solar products to meet your budget and solar needs.

Components needed for a solar PV panel energy installation

Solar PV panels – Collect solar energy from the sun to be used to power devices in a home.

  • Solar inverter – Converts the solar energy collected as DC to AC current.
  • Solar charge controller – A charge controller is used to charge the storage solar batteries.
  • Solar connectors and cables – Transfers power from the solar PV panels into the solar inverter.
  • Isolation switches
  • Electrical Cable
  • Mounting brackets for the solar PV panel
  • Batteries and battery housing depending on the type of battery
  • Installation costs
  • Qualified and trusted solar installer
  • Electrician fees – may or may not need rewiring of existing electrical cables
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